FreeBSD-7-3/i386
FreeBSD-7-3/x86-64
Debian-5-0/i386
Debian-5-0/x86-64
Centos-4-8/i386
If you are using any of the above, please consider upgrading, as you will no longer be able to use precompiled Shared Object rules on your platform. Text rules (the vast majority of the ruleset) are unaffected by this.